PIC16F87-E/ML Microchip Technology, PIC16F87-E/ML Datasheet - Page 94

• Manufacturer Part Number: PIC16F87-E/ML
• Description: IC MCU FLASH 4KX14 EEPROM 28QFN
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F87-E/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• For Use With: XLT28QFN3 - SOCKET TRAN ICE 18DIP/28QFNAC164033 - ADAPTER 28QFN TO 18DIPDV007003 - PROGRAMMER UNIVERSAL PROMATE II
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

PIC16F87/88
10.3
The SSP module in I
functions, except general call support and provides
interrupts on Start and Stop bits in hardware to facilitate
firmware implementations of the master functions. The
SSP
specifications, as well as 7-bit and 10-bit addressing.
Two pins are used for data transfer. These are the RB4/
SCK/SCL pin, which is the clock (SCL) and the RB1/
SDI/SDA pin, which is the data (SDA). The user must
configure these pins as inputs or outputs through the
TRISB<4,1> bits.
EXAMPLE 10-1:
The SSP module functions are enabled by setting SSP
Enable bit, SSPEN (SSPCON<5>).
FIGURE 10-5:
The SSP module has five registers for I
• SSP Control register (SSPCON)
• SSP Status register (SSPSTAT)
• Serial Receive/Transmit Buffer register (SSPBUF)
• SSP Shift register (SSPSR) – Not directly
• SSP Address register (SSPADD)
DS30487C-page 92
MOVF
IORLW
ANDLW
MOVWF
RB4/SCK/
SCL
RB1/
accessible
SDA
SDI/
module
SSP I
TRISC, W
0x18
B’11111001’
TRISC
Read
Clock
Shift
2
implements
C Mode Operation
MSb
2
C mode fully implements all slave
SSP BLOCK DIAGRAM
(I
Stop Bit Detect
SSPADD Reg
SSPBUF Reg
Match Detect
SSPSR Reg
2
Start and
C™ MODE)
; Example for an 18-pin part such as the PIC16F818/819
; Ensures <4:3> bits are ‘11’
; Sets <2:1> as output, but will not alter other bits
; User can use their own logic here, such as IORLW, XORLW and ANDLW
the
LSb
standard
Write
Set, Reset
S, P Bits
(SSPSTAT Reg)
2
Addr Match
C operation:
Internal
Data Bus
mode
To ensure proper communication of the I
the TRIS bits (TRISx [SDA, SCL]) corresponding to the
I
of the port containing the I
are changed in software during I
using a Read-Modify-Write instruction (BSF, BCF), then
the I
communication may suspend. Do not change any of the
TRISx bits (TRIS bits of the port containing the I
using the instruction BSF or BCF during I
tion. If it is absolutely necessary to change the TRISx
bits during communication, the following method can be
used:
The SSPCON register allows control of the I
tion. Four mode selection bits (SSPCON<3:0>) allow
one of the following I
• I
• I
• I
• I
• I
Selection of any I
forces the SCL and SDA pins to be open-drain, pro-
vided these pins are programmed to inputs by setting
the appropriate TRISB bits. Pull-up resistors must be
provided externally to the SCL and SDA pins for proper
operation of the I
Additional information on SSP I
found in the “PICmicro
Reference Manual” (DS33023).
2
C pins must be set to ‘1’. If any TRIS bits (TRISx<7:0>)
Stop bit interrupts enabled to support Firmware
Controlled Master mode
Stop bit interrupts enabled to support Firmware
Controlled Master mode
with Start and Stop bit interrupts enabled; slave is
Idle
2
2
2
2
2
C Slave mode (7-bit address)
C Slave mode (10-bit address)
C Slave mode (7-bit address) with Start and
C Slave mode (10-bit address) with Start and
C Firmware Controlled Master mode operation
2
C mode may stop functioning properly and I
2
C module.
2
C mode, with the SSPEN bit set,
2
C modes to be selected:
 2005 Microchip Technology Inc.
®
2
C pins (PORTx [SDA, SCL])
Mid-Range MCU Family
2
C operation may be
2
C communication
2
2
C Slave mode,
C communica-
2
C opera-
2
C pins)
2
C